Skip to content
USA - English
Search

Exempt Quantity Radioactive Sources

Check Sources for Energy Calibration
  • The following sources, mounted in 2.5 cm diameter sealed plastic disks, are exempt from USNRC and State Licensing and present no special storage or disposal requirements.
  • These sources are manufactured by Spectrum Techniques, Oak Ridge, TN, U.S.A.
RSS3 Set of three solid sources: Po-210 (0.1 µCi), Sr-90 (0.1 µCi), and Co-60 (1.0 µCi)
RSS5 Set of five solid sources: Po-210 (0.1 µCi), Sr-90 (0.1 µCi), Tl-204 (1 µCi), Co-60 (1 µCi), and Cs-137 (5 µCi)
RSS8 Set of eight gamma sources for scintillation spectrometry: Ba-133 (1 µCi), Cd-109 (1 µCi), Co-57 (1 µCi), Co-60 (1 µCi), Cs-137 (1 µCi), Mn-54 (1 µCi), Na-22 (1 µCi), and a mixed source of Cs-137 (0.5 µCi) and Zn-65 (1 µCi)

  • Chart of Radioactive Decay +


    Model Radioactive
    Material    		 Standard
    Activity/Source
    (µCi)    		 USNRC 30.71
    Schedule B
    Exempt Quantities
    (µCi)    		 Half-Life Radiation Energy
    (keV)    		 Branch
    (%)    		 Feeds
    Ba-133 Barium 133 1 10 10.7 y γ
    γ
    γ
    γ
    γ    		 81
    276.3
    302.7
    355.9
    383.7    		 32.8
    7.3
    18.6
    62.3
    8.8    		  
    Cd-109 Cadmium 109 1 10 453.4 d γ 88 3.8  
    Cs-137 Cesium 137 1 & 5 10 30.1 y γ
    γ
    β
    β    		 32.2
    661.6
    511.6
    1173.2    		 3.7
    84.6
    94.6
    5.4    		  
    Co-57 Cobalt 57 1 100 270 d γ
    γ
    γ    		 14.4
    122.1
    136.4    		 9.5
    85.6
    10.6    		  
    Co-60 Cobalt 60 1 1 5.3 y γ
    γ
    β    		 1173.2
    1332.5
    317.9    		 99.9
    99.9
    100.0    		  
    Mn-54 Manganese 54 1 10 312.2 d γ 834.8 99.9  
    Po-210 Polonium 210 0.1 0.1 138.4 d α 5304.5 99.9  
    Na-22 Sodium 22 1 10 2.60 y γ
    γ    		 511
    1274.5    		 179.8
    99.9    		  
    Sr-90 Strontium 90 0.1 0.1 28.5 y
    64.1 hr    		 β
    β    		 546
    2283.9    		 100.0
    99.9    		 Y-90
    Tl-204 Thallium 204 1 10 3.8 y β 763.4 97.4  
    Zn-65 Zinc 65 1 10 243.8 d γ 1115.5 50.8  
    Pb-210 Lead Nitrate 0.1 0.1 20.4 y
    5 d
    138.4 d
     
    		 γ
    β
    β
    α    		 46.5
    63
    1161.4
    5304.5    		 4.0
    19.8
    100.0
    99.9

    Bi-210
    Po-210

  • Ordering Information +


    U.S. Customers order:
    Model Description
    RSS3 Set of three solid sources: Po-210 (0.1 µCi), Sr-90 (0.1 µCi), and Co-60 (1.0 µCi)
    RSS5 Set of five solid sources: Po-210 (0.1 µCi), Sr-90 (0.1 µCi), Tl-204 (1 µCi), Co-60 (1 µCi), and Cs-137 (5 µCi)
    RSS8 Set of eight gamma sources for scintillation spectrometry: Ba-133 (1 µCi), Cd-109 (1 µCi), Co-57 (1 µCi), Co-60 (1 µCi), Cs-137 (1 µCi), Mn-54 (1 µCi), Na-22 (1 µCi), and a mixed source of Cs-137 (0.5 µCi) and Zn-65 (1 µCi)

    Non-U.S. Customers order:
    Model Description
    RSS3UN Set of three solid sources: Po-210 (0.1 µCi), Sr-90 (0.1 µCi), and Co-60 (1.0 µCi)
    RSS5-EXP Set of five solid sources: Po-210 (0.1 µCi), Sr-90 (0.1 µCi), Tl-204 (1 µCi), Co-60 (1 µCi), and Cs-137 (5 µCi)
    RSS8EXP Set of eight gamma sources for scintillation spectrometry: Ba-133 (1 µCi), Cd-109 (1 µCi), Co-57 (1 µCi), Co-60 (1 µCi), Cs-137 (1 µCi), Mn-54 (1 µCi), Na-22 (1 µCi), and a mixed source of Cs-137 (0.5 µCi) and Zn-65 (1 µCi)